Internal high pressure deformation process for making single or multi-chamber strip, comprises taking at least one sealing element radially outward through working fluid

摘要

The deformation process comprises deforming the workpiece (10) with working fluid flowing through its cavity (12) by a punch (16). At least one sealing element (26) is taken outward radially through the working fluid and is laid against a joint (30) between the strip and the punch. The working fluid is taken out of the cavity for the sealing element and into the strip cavity. An Independent claim is also included for the device used to implement the process, comprising at least one annular groove at the circumference (22) of the punch part which can enter the strip cavity, containing a sealing element (26) covering at least one supply cavity (24) for the fluid.